Projeto IoT de tomada CA inteligente baseado em fótons

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//Program to


// -----------------------------------

// Smart Socket and Energy Monitoring Device

// -----------------------------------


//Input pin for current sensor

const int Current_ip = A0;



// output pin for Relay

int Relay = D0;


//Indication LED pin

int led = D7;


//Variable Initialize for storing values of various data

double Voltage = 0;

double VRMS = 0;

double AmpsRMS = 0;

double mVperAmp = 185;


void setup 

{

   // Here's the pin configuration, which defines the mode

   pinMode(Relay, OUTPUT);

   pinMode(led, OUTPUT);

   pinMode(Current_ip, INPUT);


   // We are also going to declare a Particle.function so that we can turn the LED/Relay on and off from the cloud.

   Particle.function("led",RelayToggle);

   // This is saying that when we ask the cloud for the function "led", it will employ the function ledToggle  from this app.


   // For good measure, let's also make sure both Relay and lED are off when we start:

   digitalWrite(Relay, LOW);

   digitalWrite(led, LOW);


}


void loop 

{

   // calling the function to read the voltage value

    Voltage = getVPP ;

    //Formula to read the VRMS

    VRMS = (Voltage/2.0) * 0.707; 

    //coverting the VRMS to Ampere 

    AmpsRMS = (VRMS * 1000)/mVperAmp;

    //

      Particle.publish("Ampere", String(AmpsRMS));

       

  delay(2000);

}


// We're going to have a super cool function now that gets called when a matching API request is sent

// This is the ledToggle function we registered to the "led" Particle.function earlier.

int RelayToggle(String command) 

{

    /* Particle.functions always take a string as an argument and return an integer.

    Since we can pass a string, it means that we can give the program commands on how the function should be used.

    In this case, telling the function "on" will turn the Relay and LED on and telling it "off" will turn the Realy and LED off.

    Then, the function returns a value to us to let us know what happened.

    In this case, it will return 1 for the Relay and LED turning on, 0 for the Relay and LED turning off,

    and -1 if we received a totally bogus command that didn't do anything to the Relay.

    */


    if (command=="on") 

    {

        digitalWrite(Relay,HIGH);

        digitalWrite(led,HIGH);

        return 1;

    }

    else if (command=="off")

    {

        digitalWrite(Relay,LOW);

        digitalWrite(led,LOW);

        return 0;

    }

    else 

    {

        return -1;

    }

}


float getVPP 

{

  float result;

  

  int readValue;             //value read from the sensor

  int maxValue = 0;          // store max value here

  int minValue = 1024;          // store min value here

  

   uint32_t start_time = millis ;

   

   while((millis -start_time) < 1000) //sample for 1 Sec

   {

       readValue = analogRead(Current_ip)/4;


       // see if you have a new maxValue

       if (readValue > maxValue) 

       {

           //record the maximum sensor value

           maxValue = readValue;

       }

       if (readValue < minValue) 

       {

           //record the maximum sensor value

           minValue = readValue;

       }

   }

   // Subtract min from max and multiply with the reference voltage of ADC

   result = ((maxValue - minValue) * 3.3)/1024.0;

      

   return result;

 }

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Diagrama de circuito baseado em fótons Smart-IoT-AC-Socket

https://www.engineersgarage.com/wp-content/uploads/2019/10/ACS-712-Datasheet-Particle-Photon-Based-Smart-IoT-Socket.pdf